/Engine/Source/Runtime/Engine/Classes/Engine/MapBuildDataRegistry.h
Allocates a newFPrecomputedVolumetricLightmapDatafrom the registry. Warning: Further allocations will invalidate the returned reference.
[FPrecomputedVolumetricLightmapData](API\Runtime\Engine\FPrecomputedVolumetricLightmapDa-) & AllocateLevelPrecomputedVolumetricLightmapBuildData ( const [FGuid](API\Runtime\Core\Misc\FGuid) & LevelId )